Here is a list of WordPress Terminologies
you need to learn in WP site building.

HTML

HyperText Markup Language, commonly referred to as HTML, is the standard markup language used to create web pages. Web browsers can read HTML files and render them into visible or audible web pages.

PHP

PHP is the scripting language that runs WordPress

MySql

My SQL is a popular database used in Web Applications like WordPress, Joomla, and Drupal.
In WordPress, the database output is called XML.

HTML

HyperText Markup Language, commonly referred to as HTML, is the standard markup language used to create web pages. HTML elements form the building blocks of all websites. HTML allows images and objects to be embedded and can be used to create interactive forms.

GUTENBERG -Gutenberg is the new React-driven SPA editing experience in WordPress.